03E22 - Nemesis

While taunting Carter leave means leaving to have fun, not staying behind for more research, Jack is suddenly beamed aboard the spaceship of the Asgard Thor, who explains he is dying, and his ship falling victim in the war against the replicators, an all-infesting kind of mechanical bugs which literally devour to multiply, the transport and self-destruction mechanisms are now also disabled but their next target will be earth if they manage to land. Jack contacts SGC, asking advice and forbidding SG-1 to join him, but they do after the general overrules the colonel, assuring him they have a way back. After Sam makes sense of Thor's notes about the 'techno-bugs' and discusses them with him, she comes up with a plan to explode the ship and the bugs and escape by stargate, but it depends on meticulous timing and Teal'c placing explosives at the outside, which proves even more dangerous then it sounds...